"A two-hundred-year-old code devised by Thomas Jefferson becomes the key to a present-day conspiracy at the highest levels of Washington and the power elite of Palm Beach"--Provided by the publisher.

Presents a guide to codemaking, codebreaking, and their role in history, describing different types of codes and ciphers, discussing codebreaking and concealment techniques, and including brief stories about exciting moments in the history of the art.

Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.

Robert Langdon, Harvard professor of symbology and religious iconology, arrives at the Guggenheim Museum Bilbao to attend the unveiling of a discovery that "will change the face of science forever". The evening's host is his friend and former student, Edmond Kirsch, a forty-year-old tech magnate whose dazzling inventions and audacious predictions have made him a controversial figure around the world. This evening is to be no exception: he claims he...

Explores the tools, gadgets, techniques, and strategies used by spies, discusses famous agents and the history of espionage, and describes national and international agencies such as the FBI and MI5, business spies, internet spying, and personal spy devices that can be used to gather information, and other related topics.

A million dollars, or a clue? Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. There's a car and speedboat chase and an angry mob!

"Codes can carry big secrets! Throughout history, lots of good guys and lots of bad guys have used codes to keep their messages under wraps. This fun and flippable nonfiction features stories of hidden treasures, war-time maneuverings, and contemporary hacking as well as explaining the mechanics behind the codes in accessible and kid friendly forms. Sidebars call out activities that invite the reader to try their own hand at cracking and crafting...

Dog detectives Clancy and Lu must decipher a number of secret code languages and messages in order to discover where in the aquarium thieves have hidden a stolen sack of jewels.

This activity book is filled to the brim with exciting activities for Nate fans of all ages. There is plenty of space for kids to get creative, and all the favorite characters from Nate's world are included--the know-it-all Gina, Nate's best buddies, Francis and Teddy, his rival, Artur, and his least favorite teacher, Mrs. Godfrey, aka Godzilla. With personality pop quizzes (which Big Nate character are you most like?), the fabulous fun 'o' meter,...